Pump



S. C. BRADY April 26 1927.

- PUMP Filed July 31, 1926 .1 lllllllllllllllllllllll llllllllllllllllll "I'll:

m. 9 Mm r 0 Patented Apr. 26, 1927.

UNETED ES l tit;

ATE??? PUMP. I

Application filed July 31,

This invention relates to pumps and more particularly to a fluidpressure lift for pumping wells or the like.

An important object of the invention is to provide in a construction ofthis character a barrel which may be lowered into the fluid within thewell or tank and when connected with a means for intermittentlyconnecting the interior of the barrel with a source oi pressure and withthe atmosphere will cause an intermittent discharge of the contents ofthe well through a suitable flow pipe.

A further object of the invention is to provide in a device of thischaracter a control means such that cutting or inter mingling of thefluid being pumped with. the fluid employed to provide pressure isavoided.

A still further object of the invention isto provide means whereby thefluid pressure employed in pumping may be diverted to clean the tubingthrough which the fluid is pumped.

These and other objects I attain by the construction shown in theaccompanying drawings, wherein for the purpose of illustration is showna preferred embodiment of my invention and wherein lClie figure is avertical sectional. View through a pump constructed: in accordance withmy invention.

Referring now more particularly to the drawings, the numeral indicates acylindrical barrel having removable upper and lower heads 11 and 12. Theupper head 11 is provided with a bore 13, the upper end of which isenlarged, as at 14. lit the junction of the enlarged portion of theborewith the normal portion thereof, a seat 15 is pro vided against which isseated a valve 16 formed upon the exterior of a tubing 17, the purposeof which is to introduce pressure to the barrel. The upper end of theenlarged bore is threaded to permit application thereto of dischargetubing 18 which surrounds the pressure tubing 17.

The head is further provided with an inlet port 19 and an outlet port19, the latter communicating at its upper end with the enlarged portionof the bore and accordingly with the discharge tubing 18 about thetubing 17. The inlet port 19 is suit ably check-valved at 20 to preventreverse flow therethrough, this check valve being at present shown aslocated in a short section of pipe 21 extending into the interior of thevided with a suitable inlet screen 25.

1926. Serial NO. 126,2 L.

barrel. The lower head 12 is likewise provided with an inlet port 22which is likewise suitably check-valved at 23. This check valve shownarranged exteriorly ot' the barrel and is mounted in a conduit 2&- pro-The inlet port 19' may likewise be provided with an inlet screen it sodesired. This inlet only serves (,0 admit fluid to the casing where thelevel of the fluid within the well extends above the level of the upperend of the easing. Under such conditions, fluid will be admitted to thecasing through both the upper and lower inlets.

The exhaust port 19 has communicating therewith the upper end of aconduit 26, the lower end of which is suitably supported from the walls0: the casing by a guide 27. ll ithin this conduit above the lower endthereof is arranged a downwardly seating check valve ZSPL'GVEDUHQreverse flow. The lower end of the conduit is sealed at 29'an'd a shortdistance above this lower end an opening 30 formed in the side wall ofthe conduit. Above and below this opening, the exterior wall of theconduit is formed with valves 31 which face upwardly and are designedfor coaction with valve seats 32 formed upon plates carried by the upperand lower faces of a float 34-. The float has a acre 35 receiving theconduit 26 and the edges otthe plates project inwardly of the edges ofthis bore and are there provided with the seats 32. The lower seat 82,since it operates between the valves 31, provides a means for limitingmovement of the float, this seat engaging against the under surface ofthe upper valve when the float has elevated a predetermined distance.

In the use of the dei ie -thetubing l is connected with a suitablethree-way valve 36 having an inlet 37 communicating with a source offluid under pressure and outlet 38 cornmunica'tingwith the atmosphere.Any suitable means, such as a handle 39, may be provided for shiftingthe valve to alternately connect the tubing 17 with the inlet 37 and theoutlet 38. The discharge tubing 18 is, of course connected with asuitable reeeptacle. in c 'ation, while the tub ing 17 is incommunication with the outlet 38, fluid may flow into the barrel 10through the inlet ports 19 and 22 to fill the same. llhen the tubing 17is connected with the inlet 37, the entrance of fluid under pressurewill cause the check valves 20 and 23 to be f lm seated and the fluid.to be forced from the barrel through the opening 30, through the conduit26 to the conduit 18. The check valve 28 will prevent return flowthrough this conduit. In event it is desired that the discharge tubing18 be cleared of fluid, this may be accomplished by hitting the tubing1? sufficiently to unseat the sealed valve 16. \Vhen this is done and.pressure is introduced through the tubing 17. it the float is loweredsutliciently to engage the valves 3i with their seats, the only avenueof escape for pressure is about the valve 16 and upwardly through thetubing 18. It will be obvious that this will result in the fluid beingforced vtrom the upper end of the tubing. It the float is not seated,pressure admitted at this time will serve to drive fluid from the casinguntil the float does seat. it is pointed out that air cannot enter thetubing 18 as long as the valve 16 remains seated, due to the fact thatwhen the fluid lowers to a predetermined extent within the barrel, thevalve seats 32 en gage the valves- Bl, cutting oli the opening 30 andpreventing further discharge of either the fluid being pumped or theihiid providing the pumping pressure.

Since the construction hereinbetore set forth is capable of a certainrange 0t change and modification without materially depart ing from thespirit of the invention, 1 do not limit myself to such speciticstructure except as hereinafter claimed.

1. In a fluid pressure pump, a barrel having check-valved inlets, anoutlet for the barrel, a conduit within the barrel communicating withthe outlet and having its lower end sealed, the side wall of the conduithaving an opening, the conduit being provided above and below theopening with valves, a float surrounding the conduit and having valveseats for eoaction with said valves to thereby seal the opening when thefloat is lowered to a predetermined. degree and means for alternatelyconnecting the interior of the barrel with a source of fluid underpressure and with the atmosphere.

2. In a fluid pressure pump, a barrel having check-valved inlets, a headtor the barrel having a bore enlarged at its outer end, a dischargecasing connected with the enlarged end oi the bore, the junction of theenlarged and smaller portion of the bore providing a val vc seat, atubing engaging the sme er portion of the bore and having a valve for(reaction with said seat, means for alternately introducing fluidpressure through said tubing and connecting the tubing with theatmosphere and an outlet port for the barrel communicating with theenlarged portion or said bore.

3. In a fluid pressure pump, a barrel ha ving check-valved inlets, ahead for the barrel having a bore enlarged at its outer end, a dischargecasing connected with the enlarged end or the bore, the junction of theenlarged and smaller portion of the bore providing a valve seat, atubing engaging the smaller portion of the bore and having a valve forcoaction with. said seat, means for alternately introducing fluidpressure through said tubing and connecting the tubing with theatmosphere, an outlet port for the barrel conimunicating with theenlarged portion of said bore, the conduit con'nnunicating with saidoutlet port extending adjacent the bottom of the tubing, float means torcontrolling the introduction of fluid to said conduit and a check valvewithin the conduit preventing return flow of fluid therein.

4:. In a fluid pressure pump, a barrel having check-valved inlets, anoutlet for the barrel, a conduit within the barrel communicating withthe outlet and having its lower end sealed, the side wall of the conduithaving an opening adjacent its lower end, a float Su'rounding theconduit, coacting means upon the float and conduit "for sealing theopening of the conduit, when the float is lowered to a predetermineddegree and means for alternately connecting the interior of the barrelwith a source of fluid under pressure and with the atmosphere.

In testimony whereof I hereunto atlix my signature.

SANFORD C. BRADY.

